Fireplace Unit Designed and Built by Bay City Millwork LLC. MDF Paint Grade Fireplace Mantle Unit, Fluted Columns, Victorian Crown Molding, Raised Panel Cabinet Doors, Adjustable Shelving, and Built In Lights with Dimmer. This is one of our may projects we wanted to show for its clean lines and designe qualities. This turned out very beautiful and the customer was extreamly please with ther new wall unit.